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Sterile Yarn Verdigris

#53b3b4
Notes

Sterile Yarn Verdigris (#53B3B4) is a true cyan with a cool character. It leans cool, sitting on the blue, green, and violet side of the wheel. Quiet and dependable, a fit for product UI and data visualization. Its HSL profile (181°, 39%, 52%) places it in the balanced band at a mid lightness. It works across type, buttons, and borders, saturated enough to feel deliberate but balanced enough to not fight the rest of the palette. For a confident two-color system, pair it with its complementary red. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#53b3b4
RGB
rgb(83, 179, 180)
HSL
hsl(181, 39%, 52%)
HWB
hwb(181 33% 29%)
OKLCH
oklch(71.0% 0.090 196.2)
P3
color(display-p3 0.4251 0.6934 0.7012)
HSV
hsv(181, 54%, 71%)
LAB
lab(67.56% -27.77 -9.11)
LCH
lch(67.56% 29.22 198.17)
CMYK
cmyk(54%, 1%, 0%, 29%)

Etymology

Sterile
adjective

Latin sterilis, barren / not-fertile — sharing root with Greek steiros (barren). As a color modifier, sterile implies a clear-and-medical-clean-and-stripped quality, the crisp color of operating-theater surgical-environment white-and-stainless-steel surfaces. Sits at the crisp-and-clean end of the grid, parallel to sanitary and hygienic in usage.

Yarn
modifier

Old English gearn, spun-thread. As a color modifier, yarn implies a hand-spun-thread-and-skein quality, the visual register of hand-spun-yarn-skein hand-spun-and-skeined wool-and-cotton-and-linen hand-spun-yarn-and-skein surfaces under hand-spun-and-skeined yarn-and-skein workshop-light. Sits at the modifier-and-texture end of the grid, parallel to spun and knit in usage.

Verdigris
noun

The basic copper carbonate that forms on weathered copper and bronze — the pigment scraped from oxidized metal and used in Renaissance painting before being supplanted by more stable greens. The color refers to a thick verdigris on aged copper roofing or the Statue of Liberty's surface: a soft, slightly muted blue-green with the powdery finish of mineral oxide. Cooler than patina, warmer than seafoam, with the archaeological weight of a mineral made by time.

Closest matches

The nearest named color in three reference sources, ranked by perceptual distance (ΔE76 in CIELAB). ΔE < 1 is imperceptible to most viewers; ΔE > 10 is clearly different. When two sources point to the same hex they’re merged into one tile; click any to open that color’s page.

Variations

Click any swatch to explore

Harmonies

Accessibility

Color-vision simulation

How this color appears to viewers with the four major color-vision-deficiency types. Computed via the Machado (2009) physiologically-based model. If a tile matches the original, the color reads the same to that viewer.

#53b3b4
Original
#a8abb4
Protanopia
#989fb5
Deuteranopia
#00b8b3
Tritanopia
#9f9f9f
Achromatopsia
WCAG contrast

The color used as foreground text against pure white and pure black, with the contrast ratio and WCAG 2.1 grade. Aim for AA (4.5:1) for body text and AA Large (3:1) for 18 pt+ headlines; AAA (7:1) is the gold standard for long-form reading surfaces.

The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
Failon White
2.48:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAAon Black
8.47:1

Wide gamut

Display P3 representation

The CSS Color 4 wide-gamut form of this color. Both swatches render the same color on every display — the P3 form only diverges from sRGB when a designer pushes channels outside sRGB's reach.

sRGB hex
sRGB hex
##53B3B4
Display P3
Display P3
color(display-p3 0.4251 0.6934 0.7012)
P3 has subtle headroomOKLCH chroma 0.090

Moderately saturated colors gain a small bump in P3 — the difference is usually visible side-by-side on wide-gamut hardware but won't change the character of the color.

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